Container X contained 1200 g of sand. Container Y contained 7.2 kg of sand. After an equal amount of sand was removed from each container, Container Y now has 7 times as much sand as Container X. How much sand was removed from each container?

Pretty hard

7 * (1200 - r) = 7200 - r

The ans is 0.2

To solve this problem, we need to set up an equation based on the given information. Let's say the amount of sand removed from each container is 'x', and the remaining sand in Container X is '1200-x' grams.

We know that after removing the same amount of sand from each container, Container Y has 7 times as much sand as Container X.

The amount of sand remaining in Container Y is given by 7 times the amount in Container X, which can be expressed as '7(1200 - x) grams'.

Since Container Y initially contained 7.2 kg of sand, which is equal to 7200 grams, we can set up the equation:

7(1200 - x) = 7200

To solve for 'x', we can simplify the equation by dividing both sides by 7:

1200 - x = 1028.57

Now we isolate 'x' by subtracting 1200 from both sides:

-x = -171.43

Finally, multiplying both sides by -1 gives us the value of 'x':

x = 171.43

Therefore, approximately 171.43 grams of sand were removed from each container.